WM_PRJ_M13_UGD_001 - 001
20th July 2004
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5.5 Verifying the received signal strength
The Fastrack modem establishes a call only if the received signal is sufficiently
strong.
To verify the received signal strength, do the following operations:
!
Using a communication software such as Hyperterminal, enter the AT
command
AT+CSQ.
The response returned has the following format:
+CSQ: <rssi>,<ber>with:
o
<rssi> = received signal strength indication,
o
<ber> = channel bit error rate.
!
Verify the
<rssi> value returned which interpretation is given in the
table below.
Table 2: Values of received signal strength
Value of received signal
strength indication (<rssi>)
Interpretation of the
received signal strength
0 - 10
Insufficient(*)
11 - 31
Sufficient(*)
Greater than 99
No measure available
(*) Based on general observations.
For further information about AT commands refer to document [1].